What is the most impressive Lisp application? [closed]
I know that this is subjective and all, but still, can you provide some list of serious applications that were written in Lisp (perhaps along with what Lisp it is)?
Solution 1:
Emacs.
At least parts of it are written in Emacs Lisp.
Solution 2:
ITA Software's airline-fare search service. See here to understand why this is impressive.